/* roulang page: index */
:root {
      --primary: #2C7BE5;
      --primary-hover: #2569C7;
      --secondary: #00A9B5;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --text-dark: #0B1E33;
      --text-body: #3B4859;
      --text-muted: #6B7A8D;
      --border-light: rgba(0,0,0,0.05);
      --success: #10B981;
      --warning: #F59E0B;
      --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.04);
      --shadow-hover: 0 12px 24px rgba(0, 0, 0, 0.08);
      --radius-card: 12px;
      --radius-btn: 8px;
      --font-heading: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    }
    
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    
    body {
      font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      background-color: var(--bg-light);
      color: var(--text-body);
      line-height: 1.7;
      font-weight: 400;
      -webkit-font-smoothing: antialiased;
    }
    
    h1, h2, h3, h4, .hero-title, .section-title, .card-title {
      font-family: var(--font-heading);
      color: var(--text-dark);
      letter-spacing: -0.02em;
    }
    
    a {
      color: var(--primary);
      text-decoration: none;
      transition: color 0.2s ease;
    }
    
    a:hover {
      color: var(--primary-hover);
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    
    /* 导航栏 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      background: rgba(248, 250, 252, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-light);
      z-index: 100;
      display: flex;
      align-items: center;
    }
    
    .header-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--text-dark);
    }
    
    .logo-icon {
      display: flex;
      gap: 4px;
    }
    
    .logo-icon span {
      width: 12px;
      height: 12px;
      background: var(--primary);
      transform: rotate(45deg);
      border-radius: 2px;
    }
    
    .logo-icon span:nth-child(2) {
      background: var(--secondary);
    }
    
    .logo-icon span:nth-child(3) {
      background: var(--primary);
      opacity: 0.7;
    }
    
    .nav-links {
      display: flex;
      gap: 2rem;
      list-style: none;
    }
    
    .nav-links a {
      color: var(--text-body);
      font-weight: 500;
      font-size: 0.95rem;
      transition: color 0.2s;
      padding: 0.5rem 0;
    }
    
    .nav-links a:hover {
      color: var(--primary);
    }
    
    .nav-cta {
      display: flex;
      align-items: center;
      gap: 0.75rem;
    }
    
    .btn-primary {
      background: var(--primary);
      color: white;
      border: none;
      padding: 0.6rem 1.5rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 0.9rem;
      cursor: pointer;
      transition: all 0.25s;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      box-shadow: 0 2px 6px rgba(44, 123, 229, 0.2);
    }
    
    .btn-primary:hover {
      background: var(--primary-hover);
      box-shadow: 0 4px 12px rgba(44, 123, 229, 0.3);
      color: white;
      transform: translateY(-1px);
    }
    
    .badge-tag {
      background: #FEF3C7;
      color: #92400E;
      border-radius: 20px;
      padding: 2px 10px;
      font-size: 0.7rem;
      font-weight: 600;
      letter-spacing: 0.3px;
    }
    
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.8rem;
      color: var(--text-dark);
    }
    
    /* 板块通用 */
    section {
      padding: 5rem 0;
    }
    
    .section-title {
      font-weight: 700;
      font-size: 2.2rem;
      margin-bottom: 1rem;
      line-height: 1.3;
    }
    
    .section-subtitle {
      color: var(--text-muted);
      font-size: 1.1rem;
      margin-bottom: 3rem;
    }
    
    /* Hero */
    .hero {
      padding: 9rem 0 5rem;
      background: var(--bg-light);
    }
    
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      align-items: center;
    }
    
    .hero-title {
      font-weight: 800;
      font-size: 3.5rem;
      line-height: 1.2;
      color: var(--text-dark);
      margin-bottom: 1.5rem;
    }
    
    .hero-desc {
      font-size: 1.2rem;
      color: var(--text-body);
      margin-bottom: 2rem;
      max-width: 90%;
    }
    
    .hero-actions {
      display: flex;
      align-items: center;
      gap: 1.5rem;
      flex-wrap: wrap;
    }
    
    .btn-outline {
      border: 1px solid var(--primary);
      color: var(--primary);
      background: transparent;
      padding: 0.6rem 1.5rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: all 0.2s;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    
    .btn-outline:hover {
      background: rgba(44, 123, 229, 0.05);
      color: var(--primary);
    }
    
    .hero-image {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 360px;
      border-radius: 24px;
      box-shadow: var(--shadow-card);
      position: relative;
      overflow: hidden;
      background-blend-mode: overlay;
      background-color: rgba(255,255,255,0.4);
    }
    
    .trust-bar {
      margin-top: 3rem;
      background: var(--bg-white);
      border-radius: 40px;
      padding: 1rem 2rem;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 2rem;
      flex-wrap: wrap;
      box-shadow: var(--shadow-card);
    }
    
    .trust-item {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      color: var(--text-muted);
      font-weight: 500;
    }
    
    .trust-circle {
      width: 32px;
      height: 32px;
      background: #E2E8F0;
      border-radius: 50%;
    }
    
    /* 数据看板 */
    .dashboard-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    
    .stat-card {
      background: var(--bg-white);
      border-radius: var(--radius-card);
      padding: 2rem;
      box-shadow: var(--shadow-card);
      transition: all 0.3s;
    }
    
    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    
    .stat-icon {
      font-size: 2rem;
      color: var(--secondary);
      margin-bottom: 1rem;
    }
    
    .stat-number {
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--secondary);
      line-height: 1.2;
    }
    
    .stat-label {
      color: var(--text-muted);
      margin-top: 0.5rem;
    }
    
    /* 服务矩阵 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    
    .service-card {
      background: var(--bg-white);
      border-radius: var(--radius-card);
      padding: 2rem;
      box-shadow: var(--shadow-card);
      transition: all 0.25s;
      display: flex;
      flex-direction: column;
    }
    
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    
    .service-icon {
      font-size: 2.2rem;
      color: var(--primary);
      margin-bottom: 1.25rem;
    }
    
    .card-title {
      font-weight: 600;
      font-size: 1.25rem;
      margin-bottom: 0.75rem;
    }
    
    .feature-list {
      list-style: none;
      margin-top: 1rem;
      color: var(--text-body);
      font-size: 0.9rem;
    }
    
    .feature-list li {
      margin-bottom: 0.5rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }
    
    .feature-list i {
      color: var(--success);
      font-size: 0.8rem;
    }
    
    /* 结果对比 */
    .compare-wrapper {
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      gap: 2rem;
      align-items: center;
    }
    
    .compare-card {
      background: #F1F5F9;
      border-radius: var(--radius-card);
      padding: 2rem;
    }
    
    .compare-card.highlight {
      background: #EBF5FF;
      border: 1px solid rgba(44,123,229,0.2);
    }
    
    .compare-title {
      font-weight: 700;
      margin-bottom: 1.5rem;
    }
    
    .compare-list {
      list-style: none;
    }
    
    .compare-list li {
      margin-bottom: 0.8rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }
    
    .vs-icon {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary);
      background: white;
      width: 60px;
      height: 60px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-card);
    }
    
    .testimonial {
      margin-top: 2rem;
      font-style: italic;
      border-left: 4px solid var(--primary);
      padding-left: 1.5rem;
      color: var(--text-dark);
    }
    
    /* FAQ */
    .faq-grid {
      display: grid;
      grid-template-columns: 200px 1fr;
      gap: 2rem;
    }
    
    .faq-categories {
      display: flex;
      flex-direction: column;
      gap: 0.5rem;
    }
    
    .faq-cat {
      padding: 0.7rem 1rem;
      border-radius: 8px;
      font-weight: 500;
      cursor: pointer;
      transition: 0.2s;
    }
    
    .faq-cat.active {
      background: var(--primary);
      color: white;
    }
    
    .accordion-item {
      background: var(--bg-white);
      border-radius: 12px;
      margin-bottom: 12px;
      box-shadow: var(--shadow-card);
    }
    
    .accordion-header {
      padding: 1.2rem 1.5rem;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
    }
    
    .accordion-content {
      padding: 0 1.5rem 1.2rem;
      color: var(--text-body);
      display: none;
    }
    
    .accordion-item.open .accordion-content {
      display: block;
      background: #F8FAFC;
    }
    
    /* CTA */
    .cta-section {
      background: linear-gradient(135deg, #E8F4FD 0%, #F0F9FF 100%);
    }
    
    .cta-form {
      display: flex;
      gap: 12px;
      max-width: 500px;
      margin: 2rem auto 0;
    }
    
    .cta-input {
      flex: 1;
      padding: 0.8rem 1rem;
      border: 1px solid #D1D5DB;
      border-radius: 8px;
      font-size: 1rem;
      outline: none;
    }
    
    .cta-input:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(44,123,229,0.1);
    }
    
    /* Footer */
    .site-footer {
      background: #0B1E33;
      color: #94A3B8;
      padding: 3rem 0 2rem;
    }
    
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 2rem;
    }
    
    .footer-logo {
      font-size: 1.5rem;
      font-weight: 700;
      color: white;
      margin-bottom: 1rem;
    }
    
    .footer-links li {
      list-style: none;
      margin-bottom: 0.5rem;
    }
    
    .footer-links a {
      color: #94A3B8;
    }
    
    .footer-links a:hover {
      color: var(--primary);
    }
    
    .copyright {
      border-top: 1px solid rgba(255,255,255,0.1);
      margin-top: 2rem;
      padding-top: 1.5rem;
      text-align: center;
    }
    
    @media (max-width: 1024px) {
      .hero-title { font-size: 2.8rem; }
      .services-grid { grid-template-columns: repeat(2,1fr); }
    }
    
    @media (max-width: 768px) {
      .nav-links, .nav-cta .badge-tag { display: none; }
      .mobile-menu-toggle { display: block; }
      .hero-grid { grid-template-columns: 1fr; }
      .hero-image { min-height: 250px; }
      .dashboard-grid, .services-grid { grid-template-columns: 1fr; }
      .compare-wrapper { grid-template-columns: 1fr; }
      .vs-icon { margin: 1rem auto; }
      .faq-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      section { padding: 3.5rem 0; }
    }